Rotary harrow.



No. 823,933. PATENTED JUNE 19, 1906..

GI J.

ROTARY HARROW. ABPLIOATION FILED 00'1.14,1905.

To all whom it may concern! guarded against.

.ioning UNITED, STA S" PATENT orrron.

oHAnnEs J. DAVIS, or LANSING, MICHIGAN.

Be it known that 1, CHARLES J. DAvrs,a citizen of the United States, residing at Lansing, in the county of Ingham and State of Michigan, have invented certain new and useful Improvements in Rotary Harrows, of which the following is a specification. j

My invention relates to rotary harrows',

and has forits object the production of a harrow having three rotating parts and pro videdwith a platform-frame and bearings of peculiar construction, 'whereby'the weight of the rider and frame is most evenly distributed upon the rotary parts and undue strains upon the center pins or pivots relieved and I accomplish the object set forth by fashand associating elements substantially as illustrated in the accompanying drawings, of which' Figurelrepresents a top lanview. Fig.

I -'2,is a cross-section of owe the frame-bars I of the spool-roller tothe bar.

flangeetrack are also represented in section. a

and shows theclamp for attaching the axis The spool" and Fig. 3 is a cross-section of theright-hahd rear rotating member on line X X, one'transverse diametrical tooth-bearing bar only being shown. Fig. 4 is an enlarged front view of the pivoted blade-tooth, Fig.5 is an enlarged side view of the pivoted blade-tooth,

and Fig. 6 is an enlarged detail view of one of the center pins and itssbearings.

i Lik .letters of referencedesignatellik e P h ughout, I i r Letter A mark barforming the base of a triangular frame,

larly. to the base-bar A andpasses through the apex of the triangle. The small letters the ends of bars A and D,

A The rotary I teeth'e, usually consisting of spikes'passed through the bars and held rigidly. The bars areconnected together at their common cenouter extremities horizontal flange.

ter F, and they are also connected near their angle-ironG, to which is bolted, as shown in Fig. 3, the annularangle-iron H, which has a The angle-iron H consti tutes a trackthe inner edge'of which engages the spool wheels'J. The axis of the spools is Specification of Letters Patent. Application filed October 14, 1905. Serial No. 282,804.

- pivotally a transversely disposed by means of the annular ROTARY HARROW.

designated by letter K. ,It is vertical, as

shown, and its upp er portion is screw-thread-I ed. The threaded portion passes through theprojecting ends of a C-clamp L, and by meansof nuts M" the clamp is secured about the bars of the frame, as illustrated in Fig. 2.

Patented June' 19, 1906.

It will nowbe observed that certain of the spools are located projecting ends a, a, and d of the bars A and prlaced upon the triangular portion of the ame at equal distances from the angles.

the plates 0 at the angles of'the triangular frame and through the common center piece Fof thetooth-bars, as shown in Fig. 6.

The center pins N pass downwardly through near the extremities of the 5- D, already referred to, and other spools are I In order to cause the :rotary members of. my invention to" turn constantly, Isecure at the ends of eachtooth-bar a pivoted blade-v tooth Pr; Itfis', as shown, a curved. blade with edges converging to a point at its'lower end .and having the slot p formed lengthwise through its upperportion. It is secured, by me'ans'of the cross-piece clampsQ and screws q, upon the backing or supporting tooth R,

which has, as illustrated in'Fig. 5, a longitudinal raised portion 1", the, blade-tooth. The backing-tooth R is shown, to the radial tooth-b 'arE. In theusual manner as my invention is drawn along, the

pivoted teeth drag upon one side over the" ground and catch intogthe ground upon the otherl'side of each rotary memb er thus causing it to turn.

track-flange limits the rocking movement of the frame with respect to the rotary members thus described my invention and I andprevents unusual shocks upon them.

Having I explained the modeof its operation, what I with a triangularframe composed of framebars and the ends of two of saidbars being arranged to roject triangular rame, of rotary elements, center. pins passing gular frame and through the center of'the said rotary elements, by the said rotary elements, cured to the said frame and arranged to ensecured to the plate S, bolted, as-

1. In a rotary harrow, the combination hatv fits the slot p. of i The. engagement: of the 50015 and the I beyond the angles of the I through the angles of'said t'riancircular tracks borne and wheelssegage the said circular tracks, each of the said projecting ends of the frame-bars having se cured thereto outside of the triangular frame one of the said wheels, and pivoted teeth at- IIO tached to said rotary elements and adapted to drag upon one side and to catch the ground upon the other side of the said rotary elements whereby they are rotated, substantially as described.

2. In a rotary harrow, the combination with a triangular frame composed of framebars and the ends of two of said bars being arranged to project beyond the angles of the triangular frame, of rotary elements, center pins passing through the angles of said triangular frame and through the center of the said rotary elements, circular tracks having horizontal flanges borne by the said rotary elements, and spool-wheels secured to the said frame and arranged to engage the said circular tracks, each of the said projecting CHARLES J. DAVIS.

my signature Witnesses:

ERNEST D. GIBBs, F. M. SEELEY. 

